Wind mitigation credits and your windows

Florida homeowners insurance has a mechanism most states do not. Section 627.0629 of the Florida Statutes requires that insurers' residential rate filings include actuarially reasonable discounts, credits or other rate differentials for construction features that reduce hurricane damage. Opening protection is one of those features, alongside roof shape, roof deck attachment, roof-to-wall connections and secondary water resistance.

That is a legal requirement on the filing, not a promise of a particular number on your renewal. How much it is worth varies by carrier, by policy and by the rest of the building, and it is entirely possible for opening protection to be worth a lot on one house and modestly on another with a weaker roof.

How the credit is triggered

Through an inspection. The state prescribes a Uniform Mitigation Verification Inspection Form, designated OIR-B1-1802, which a qualified inspector completes and which the insurer uses to apply credits. An updated version of that form took effect in April 2026, so an inspection carried out before then may sit on the older version.

The form is a factual record of what is installed, not an opinion about it. On the openings section the inspector is documenting whether the glazed openings are protected, by what means, and to what standard. That is why an install that cannot be documented is an install that may not count.

The all-or-nothing problem

The single most common disappointment is partial protection. Credits for opening protection generally rest on all the glazed openings being protected, because a building with one unprotected opening can still be pressurized through it. Nine impact windows and one original aluminum slider in the laundry room is, from the form's point of view, an unprotected building.

This has a direct consequence for phasing. Splitting a window project across two budget years is perfectly sensible for comfort and for condition, but if the goal is an insurance credit, the credit generally does not arrive until the last opening is done. Worth knowing before the first deposit rather than after the second.

It also means the openings people forget are the ones that cost them: the garage door, the small bathroom windows, the porch glazing, and the patio slider, which is the largest opening in most Deltona houses.

Shutters count too

Approved shutters qualify as opening protection in the same way impact glazing does. The choice between them is about cost, deployment and daylight rather than about which one the form recognizes, and the comparison guide works through it.

One caveat that catches people: protection has to be the approved kind. Plywood cut to fit is not a documented product, and screens or films that were never tested to the standard do not become mitigation because they were expensive.

Keep the paperwork

After an install, keep everything the job produced, because the mitigation inspector will want to see it and so will a buyer's agent in five years:

• The Florida Product Approval numbers or Miami-Dade Notices of Acceptance for the products installed
• The permit number and the record that it was finaled
• The signed installation affidavit
• The contract and the invoice, itemizing which openings were done
• Photographs of the labels before they were removed from the glass

That last one sounds fussy and is the item people wish they had. Product labels come off the glass on handover and the information on them is not recoverable afterward without going back to the manufacturer.

Grant money

Florida's My Safe Florida Home program, run through the Department of Financial Services, grants money toward hurricane hardening, and impact windows and doors are explicitly eligible upgrades. The maximum grant is $10,000, and the eligibility conditions are narrow: a cap on insured value, an original building permit predating 2008, and a limit to owner-occupied homesteaded single-family homes and townhouses. Funding follows the state budget cycle and application windows open and close accordingly, with new inspection applications paused at the time of writing while grant applications continue to be processed. Check the program's own site for current status before relying on it.

The realistic summary

Opening protection is worth real money on a Florida premium, the mechanism is statutory rather than discretionary, and it is documented through a standard inspection form. It is rarely worth buying impact glazing for the insurance credit alone, and it is frequently worth choosing impact glazing over standard when the windows are being replaced anyway. Get the whole envelope done, keep the paperwork, and book the mitigation inspection once the last opening is finished.

To price protection on your own openings, a free measured quote is the starting point, and the calculator gives a bracket first.